Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
  • B65D5/20—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form
  • B65D5/24—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with adjacent sides interconnected by gusset folds
  • B65D5/244—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with adjacent sides interconnected by gusset folds and the gussets folds connected to the outside of the container body
  • B65D5/246—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with adjacent sides interconnected by gusset folds and the gussets folds connected to the outside of the container body the container body comprising a continuous rim or flange
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
  • B65D5/20—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form
  • B65D5/2038—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form at least two opposed folded-up portions having a non-rectangular shape
  • B65D5/2047—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form at least two opposed folded-up portions having a non-rectangular shape trapezoidal, e.g. to form a body with diverging side walls
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
  • B65D5/20—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form
  • B65D5/24—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with adjacent sides interconnected by gusset folds
  • B65D5/241—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with adjacent sides interconnected by gusset folds and the gussets folds connected to the inside of the container body
  • B65D5/243—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with adjacent sides interconnected by gusset folds and the gussets folds connected to the inside of the container body the container body comprising a continuous rim or flange
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
  • B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
  • B65D81/3446—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
  • B65D81/3453—Rigid containers, e.g. trays, bottles, boxes, cups

Definitions

• a tray particularly for foodstuffs
• the present invention relates to a tray, particularly for foodstuffs, said tray being produced from a stamped and creased blank made from carton or the like stiff mat ⁇ erial, said tray consisting of a bottom and four side walls, the latter being connected to each other in pairs by a corner structure consisting of at least two substan ⁇ tially triangular areas in contact with adjacent side walls having extensions in the form of folded-out flanges, which lie in a plane parallel to the bottom of the tray and form a continuous frame for coaction with a separate lid with which the tray may be closed.
• Trays of this type are used for foodstuffs, and then often for ready-cooked food, which is usually warmed up directly in the tray, e.g. with the aid of a microwave oven or a hot air oven.
• the side walls are pro ⁇ vided with folded-out, outstanding edge flanges forming a frame against which a lid is intended to be fixed, e.g. by hot-melt sealing, after the tray has been filled.
• the outstanding edge flanges have caused quite a few problems. From the handling aspect, the flanges result in that the trays cannot be put on their side edges during packing, and that hooking together or flange collisions occur, with the result that there is tray leakage. Furthermore, the flanges take up space, since a gap corresponding to the flange width occurs between the trays when they are packed side by side.
• each of the side walls is inclined at an acute angle to the bottom plane of the tray in the area above a crease line extending round the periphery of the tray and at a given distance from the bottom plane thereof, so that the continuous frame formed by the edge flanges is substantially inside the outer contour of the side walls.
• Figure 1 is a perspective view of a first embodiment of a tray in accordance with the invention.
• Figure 2 is an end view of the tray illustrated in Fig. 1,
• Figure 3 is a plan view of the blank to the tray illustrat ed in Figures 1 and 2,
• Figure 4 is a perspective view of a second embodiment of the tray in accordance with the invention, in which the fastening flaps are fixed to the inside of the short side walls.
• Figure 5 is an end view of the tray illustrated in Figure 4
• Figure 6 is a plan view of the blank to the tray illustrat ed in Figures 4 and 5
• Figure 7 is a side view of a third embodiment of the tray in accordance with the invention.
• Figure 8 is a plan view of the blank to the tray illustra ed in Figure 7.
• the tray 1 illustrated on the drawings is preferably manu factured from carton or the like stiff material, having at least on the side facing towards its interior a liquid proof, sealable, high temperature-resistant coating such as polyester.
• the tray 1 has a bottom 2 and four side walls 3, 4,5, 6 connected in pairs to each other by a corner structure 7 including a fastening flap 8, which is either attached to the outside or inside of the adjacen side wall.
• the side walls 3, 4, 5, 6 have an upper portion 9 inclining at an acute angle to the bottom 2 of the tray from a crease line 10 round the tray 1.
• the side walls 3, 4, 5, 6 have an extension in the form of an edge flange 11 folded out in a plane parallel to the bottom of the tray 1 from the upper inclined portion 9, and forming a frame running round the opening of the tray 1 for coaction with a separate lid which is sealable against the tray 1, although this lid is not shown on the drawing.
• the upper side wall portion 9 forms an angle to the bottom 2 and extends upwards a distance there from such that the con- tinuous frame formed by the edge flange 11 is inside the outer contour of the side walls 3, 4, 5, 6.
• O lines 16, 17, 20 start from the respective corner 21 of the bottom 2.
• An extension running substantially round the whole of the periphery of the blank forms the edge flange 11 when the blank is erected.
• This edge flange 11 is defined by an edge crease line 22, between which and the crease lines 12-15 there extends a crease line 10 substantially round the whole of the blank at a pre ⁇ determined distance from the bottom crease lines 12-15.
• At its free outer end one of the two outer corner crease lines 16, 17 has two converging crease lines 24, 25 which meet each other at a point 23 situated on the edge crease line 22.
• the outer crease line 24 starts from the end 26 of the corner crease line 16 at the periphery of the edge flange 11, and the other crease line 25 starts from the intersection point 27 of the corner crease line 16 with the crease line 10.
• These crease lines 24, 25 are pref ⁇ erably situated on one of the triangular areas 18 or 19 forming the corner portions 7. It is possible, however, to extend the crease lines 24, 25 on the outer portions of the side walls outside the crease line 10. Either of the corner areas .18 or 19 in the corner portion 7 has an extension in the form of an edge flange, similar to the side walls, which may be folded out along an edge crease line 28 when the blank is erected, and constitutes an extension of the edge crease line 22 of the adjacent side wall.
• the blank illustrated in Figure 3 has a corner structure 7 in which the fastening flap 8 is intended to be attached to the outside of the side walls 3, 4 when the blank is erected, as will be seen from the erected blank 1 il ⁇ lustrated in Figures 1 and 2.
• the fastening flap 8 is intended to be attached to the outside of the side walls 3, 4 when the blank is erected, as will be seen from the erected blank 1 il ⁇ lustrated in Figures 1 and 2.
• the corner area 19 has a cutout 29 contiguous* to the corner crease line 17 via a flap portion 30.
• the flap portion 30 is divided by a short crease line 31 into an inner 32' and an outer part 32.
• the side walls 3, 6 are folded up, by an unillustrated forming tool including outer and inner erecting means, to a position in which the fastening flaps 8, achieved by double-folding of the areas 18, 19 along the crease line 20, are attached preferably by heating to the out ⁇ side of the side walls 3, 5.
• unillustrated outer and inner forming means move diagonally inwards, at least towards the corner portions 7 of the tray 1, for providing an inward position al displacement of the edge flange 11 and the upper portio 9 of the tray 1 round the side walls 3-6 of the tray 1 and parallel to the crease line 10 running round the bottom 2, simultaneously as the edge flanges 11 are folded out to a position parallel to the bottom 2, and the corner portion 7 under the edge flange 11 is rolled in and the excess material there compressed into the space 33 arrange in the corner portions.
• This space 33 occurs in this embodiment between the corners 34 of the erected blank and a crease bead 35 formed by the corner crease line 17.
• the tray blank can be supplied with sufficient heat so that forming during the second operation can be carried out with a cold tool.
• the tray corners will be
• the blank illustrated " in Figure 6 has a corner structure 7, in which the fastening flap 8 is intended for attach ⁇ ment to the inside of the side walls 3, 5 when the blank is erected.
• This may be suitable from the decoration . aspect, for example.
• a tray 1 manufactured from the blank illustrated in Figure 6 is shown in Figures 4 and 5.
• both corner crease lines 16, 17 form a right angle to the bottom crease line of the contiguous side wall.
• the corner area 18 is provided with an edge flange and both crease lines 24, 25, while the other corner area 19 is provided with a triangular cutout 34.
• This cutout 34 has one of its corners at the meeting point 35 of the corner crease line 17 and the crease line 10, and has its side edges 36, 37 extending to the outer edge of the corner area 19, said outer edge being defined by an imaginary linear extension of the edge crease line 22 of the contiguous side wall 3, 5.
• Erection of the blank illustrated in Figure 6 is accomplished in the same way as that for the embodiment described above and illustrate in Figures 1-3, except for the folding of the fastening flaps 8, these flaps being attached to the inside of the tray side walls 3, 5 for the blank illustrated in Figure 6
• the cutout 34 provides a space 38 below the edge crease line 22 to enable pressing in the corner portion 7 under the edge flange 11.
• the blank shown in Figure 8 has a corner structure 7 in which the fastening flap 8 is intended to be attached to the inside of the side walls 3, 5, similar to the case with the embodiment illustrated in Figures 4-6.
• the corne structure 7 for the embodiment using the blank illustrate in Figure 8 is however designed so that the erected blank forms a tray 1 with conical side walls 3-6 i.e. these for an obtuse angle to the bottom 2 of the tray 1.
• This tray variant makes the contents of the tray 1 easily available, in spite of waisting the upper portion of the tray.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Food Science & Technology (AREA)
• Cartons (AREA)
• Closures For Containers (AREA)
• Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
• Making Paper Articles (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20344756

Family Applications (1)

Country Status (9)

Cited By (5)

Families Citing this family (8)

Citations (1)

Family Cites Families (7)

• 1981
  • 1981-10-09 SE SE8106004A patent/SE444662B/sv not_active IP Right Cessation
• 1982
  • 1982-10-08 AU AU89953/82A patent/AU556983B2/en not_active Ceased
  • 1982-10-08 US US06/503,156 patent/US4533079A/en not_active Expired - Lifetime
  • 1982-10-08 JP JP57503135A patent/JPS58501673A/ja active Pending
  • 1982-10-08 DE DE8282903078T patent/DE3274098D1/de not_active Expired
  • 1982-10-08 EP EP82903078A patent/EP0090833B1/en not_active Expired
  • 1982-10-08 WO PCT/SE1982/000324 patent/WO1983001242A1/en active IP Right Grant
• 1983
  • 1983-06-08 DK DK260983A patent/DK150133C/da not_active IP Right Cessation
  • 1983-06-08 FI FI832065A patent/FI69607C/fi not_active IP Right Cessation

Patent Citations (1)

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